Porsche 911 Transmission Repair
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- เผยแพร่เมื่อ 6 ต.ค. 2024
- This transmission came to us in a 1983 911SC. The first complaint was a fuel smell, and a reported fuel leak. So, we went ahead and did the fuel lines in the tunnel.
Fuel lines in the tunnel, • Porsche 911 Fuel Lines...
Next we took a test drive on the transmission. Work had recently been done, but the shift was not as it should be.
When we opened up the transmission, it was clear it had not been rebuilt in some time. Silicon sealant was an indication that it had been opened at some earlier time in its life.
After replacing all the synchro rings, bearings, and most of the dog teeth, it was time to reassemble and measure. The bearing drag, pinion depth, and crown wheel backlash were all out of specification. With a bunch of shims from Porsche, we got this 915 transmission back within tolerance.
After all the new parts, this transmission needed extended road testing. With everything settled in, it was time to send this silver bullet on its way.
If you need more detail, please check out our transmission playlist. Here you will find hours of transmission rebuilding. As well we cover setting up the VW 383 tool.
Transmission, Transaxle, • Transmission Transaxle
VW385 tool, • Using a VW-385 Tool. ...
Thanks for watching - ยานยนต์และพาหนะ
I have the same issue with my 1st gear. Won’t go into 1st unless I come to a complete stop. Otherwise it will grind.
Now I know what to expect.
Thank you
Yes sounds like the synchro assembly is completely worn out on that one.
Kurt
Mine too
@@diogeneslamp8241 had my transmission rebuilt since. Goes into all gears perfect!
Absolute pleasure watching a master at work.
Thanks, glad you enjoyed it
Kurt
Outstanding work kurt! I just wish I'd found you first. You do ethical, honest work, thank you again.
Thanks Chuck,
Kurt
Awesome video. I recently had my 915 rebuilt and I asked for all the parts that were replaced and while everything was explained it was a bit overwhelming. Nice to go back and compare with your excellent video.
Glad it helped Keith,
We always return all removed parts to our customers.
Kurt
1❤11😮😮😮😮😮😮😮99 o p19p I 9
Don’t you just love having to fix not just the assembly’s wear problems but the problems created by the Jack-leg mechanic who had his hands on it previously. As a mechanical engineer in the automotive industry - it’s a pleasure to see someone with solid skills maintain the powertrain by adhering to proper technical specs and repair guidelines. Customers can depend on this guy in my opinion.
Yes I seem to come across a lot work that is not done very well. Unfortunately there is a lot of bad information out there and it seems that opinion drives repairs more than facts.
Thanks
Kurt
Another outstanding video with great tips!
Glad you enjoyed it!
Kurt
Another really informative video. Thanks, keep em comming!
Thanks, will do!
Kurt
Kurt, I love your videos. We keep them up next to the bench while doing rebuilds as a refresher and cross reference. For the DIY, what cleaners do you recommend for the case and internals? If the case is sealed and we just want to freshen up externals to remove gunk before reinstall, what's a good process for cleaning the outside case?
For internals I use Ozzie Juice in a heated parts washer. with just washing the exterior I would just use your favorite degreaser and a pressure washer. Just make sure to seal the breather vent on top of the transmission and do not direct the water stream directly at the input shaft or selector shaft seals.
Kurt
Even in the lucrative Porsche market, some shops have the audacity to cut corners and sell 100k mile old boxes as reconditioned.
Yes its a shame
Recently found your channel and it's very informative and well put together. It's very clear that you know your onions! I have just done a transmission fluid dump and noticed a small piece of what I know now to be a dog ring tooth. It was stuck to the magnetic drain plug. My Transmission was rebuilt about 5 years ago by a local specialist and it has always been a good shifting 915. In fact, it is still shifting well even minus one tooth. However, I am conscious of further damage and I am starting to think about a rebuild. Seeing as you are on the other side of the planet to me, I guess I will have to think about doing this myself. :-) I rebuilt my engine in my garage and I have a pretty good set-up, so I am quite confident that I could attempt it. However, it's the final set up of the Diff that I am worried about as I believe that there are some special tools required? I did this job on my MGB years ago and it worked out well, but I think that was mostly down to luck. Do you think this is a job that can be tackled by an Engineer who happens to be a hobby Mechanic? Many thanks and keep up the great content!
The tooling is the biggest key to being successful. If you are just staying on the transmission side of things then yes, you should be okay. You will still need to buy some tools to change the dog teeth. However, if you need to change anything on the diff side you will need to find someone that has the tooling to set up the gears for you.
Kurt
@@klassikats Thanks for your reply Kurt. Very much appreciated. I'll let you know if and when this happens.
Interesting, lot of gear shops would steal good parts from your gear box swap in worn parts, and put new synchros in it, and hope you don’t come back for a year or more when it’s out of warranty… Proper rebuild right here ….
thankfully these shops usually dont last long.
World class skills and made interesting to watch/ listen to a craftsman at work
I’ll be changing sympathetically in mine ( 04 Boxster S ) seeing as there are sooooo many individual parts at work to give me pleasure.
❤️ ‘d this , well done 👏 🏴🙏
Amazing videos. I've watched this and the earlier series on 915 transmission rebuild several times. I have similar issues with my 915 on my 1973 911E. Can you share a list of the specialist tools which you used/recommend to do a similar rebuild?
I never plan to sell my car and plan to do a rebuild and change all the parts which wear out. I see you focus on syncro rings, dog teeth gears, bearing and bearing sheaths. What else do you recommend changing?
Sorry about the late reply Here is a quick list of the must haves
VW 385/1 Diff measuring bar
VW 385/14 Plunger for diff bar
VW 385/17 Magnetic disc
VW 385/30 master gauge
VW 388 Measuring lever
VW 385/4 Centering mandrels
P260A Shift fork adjustment plate
P37A Drive shaft Lock Plate
VW 521/4 Locking sleeve
P355A Input shaft holding plate
Bearing Puller Set
20 Ton Press
Press plates and Tubes
Dial Gauge
1/2" Torque Wrench capable of at least 300 NM
3/8" Torque Wrench
Torque Meter
Feeler gauges
As well as general hand tools Metric sockets and wrenches etc.
All in all it is fairly substantially investment. Most of these tools are no longer available new and if I had to guess buying everything today could be a $15,000 to $20,000 investment.
Kurt
Great video bud, how much did the parts & labor come out to ?
Can't remember exactly on that one, but as an average, you can figure a complete transmission repair is going to range from $4000 to $6000 depending on what work is done and what parts are needed
Kurt
LOL! I have the same problem!
we can help if you need
Kurt
Outstanding
Thanks
Approximately, how much would this rebuild cost?
That depends, The whole ticket on this job was just under 8K but we also did some engine oil leaks as well as R&R of the engine. Depending on where you are and what work you have done pricing can really vary
Kurt
Thank you. After watching you do the rebuild with precision and care I would say 8K was a bargain.
What do these parts and labor run on this repair?
it Varies from job to job depending on condition. Transaxles start around $4500 and go up from there.
Kurt
Is it true that the 915 has no neutral detent?
No that is not true. All the shift fork shafts have a neutral detent cut into them.
Kurt
Zen master of air cooled Porsche at work here.
Thanks
Kurt